Lantern



FIG. 1 is the front elevational view of a lantern showing my new design;

FIG. 2 is the left side view thereof;

FIG. 3 is the right side view thereof;

FIG. 4 is the top view thereof;

FIG. 5 is the bottom view thereof; and,

FIG. 6 is a top, front and right side perspective view thereof.

The broken line showing of a light bulb is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a lantern, as shown and described. 